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M. F. WILLIAMS. COMBINED DISINTEGRATING AND SEPARATING DEVICE.APPLICATION FILED FEB. 23. 1918.

1 ,3 1 2, 6 5 8. Patented Aug. 12 1919.

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. shown bifurcated pipes D D, andreturn air MILTON F. WILLIAMS, or s'r.LoUIs, MISSOURI.

COMBINED DISINT'EGRATING AND SEPARATING DEVICE.

Specification of Letters Patent.

Application filed February 23, 1918. Serial No. 218,748.

To all whom it may concern Be it known that I, MILTON F. WIL IAMS, acitizen of the United States, residing at St. Louis, 'State of Missouri,have invented certain new and useful Improvements in- CombinedDisintegrating. and Separating Devices, of which the following is aspecification.

This invention relates to certain new and useful improvements incombined disintegrating and separating devices for grinders, pulverizersand like disintegrating devices.

The main object of my invention is to of feet a condensation of themixture of feed material and air, just prior to delivery of the feed toa grinder. To this end my improvements have reference to a vacuum feederinterposed in a pneumatic feeding system just prior to the grinder, andto which the supply is delivered pneumatically and from which the feedis sucked directly to the hopper of the rinder. In the figure of theaccompanying d rawing is shown a side view of my improved combinedfeeding and separating device in connection with a reducing system thatis the subject of Letters- Patent No. 1,116,777, dated Nov. 10, 1914.,wherein a flywheel fan A draws the ground material from below a inder Band blows it to a separator or co lector O; and have pipe Ecommunicating with said grinder as disclosed in Letters Patent onpneumatic separator 1T0. 1,235,174, dated July 31, 1917; said return airpipe E however, in the present application connects with an air-tightbox F, having a door normally sealed. A pipe G, smaller than pipe E,leads upward from said box and turns horizontally to a tangentialconnection with an expansion or vacuum chamber H, preferably consistingof a drum body with conical top and bottom and constituting a cyclonecollector producing more or less of a vacuum and used for a feeder. ;Thesaid bottom is connected by a pipe I having an air tight connection withthe hopper of said grinding mill below the same; this forms a suctionchute for the feed. Another pipe J leads upward ofi the upper end of theconical top, and then downward to the grinder housing below the mill;this forms a return air pipe that draws more or less of the surplus airfrom the vortex center of said expansion chamber thus producing apartial vacuum as usual with cyclone collectors while the feed materialgravitates spirally under suction through said feed chute to thegrinder.

' Since a pneumatic system requires about fifty cubic feet of air perpound of material conveyed, most of this carrying air becomes surplus assoon as the air mixed feed reaches said feeder H, from which the feedcan gravitate under suction to the grinder. The pipe J serves as aby-pass for this surplus air, and delivers it under the grinder readyfor re-admixture with the freshly ground feed, for conveying it forwardin the system as has been done heretofore. A slide valve K in said pipeJ allows of varying the pro- Patented Aug. 12, 1919. i

portion of the air taken off by the pipe J,

to the air entering the grinder along with the feed. The feed isadmitted laterally to the pipe G by a slant pipe L forming a sharp elbowtherewith and'communicating with the bottom of a receiving hopper M, inwhich the feed material piles up when delivered thereto by a feed chuteN pro-- vided with a regulating .valve 0. Air is thus hindered fromentering the pipe L while the feed is supplying the hopper. When thefeed is cut off by the said valve 0, and the feed that isin the hopperhas been drawn in, the hopper may be covered by a board or othertemporary :cover until the last of the feed is sucked through the pipe Gand vacuum feeder to'the grinder. The suction of said fan produces anupward current in pipe G, from the sealed box F and pipe E, and the feedis conveyed over to the expansion chamber, while metal and other foreignmatter drops into said box.

An air pipe P serves to anix part of the return air with the enteringfeed material below the receiving hopper.

A slip sleeve valve Q over an opening in pipe G above the entrance offeed material, serves to regulate the suction so as not to carry overthe light foreign particles with the feed, to the expansion chamberfeeder.

I claim:

1. A device of the character described comprising a disintegrator, avertical pipe having a feed inlet at its side, an expansion chamberlocated above said disintegrator and feed inlet and in communicationwith between the same, and a suction device commen to saiddisintegrator, expansion chamber and vertical pipe, si-ibstantially asdescribed.

A combined disintegrating and metal separating apparatus comprising adisintegrator, a hopper with an inclined discharge pipe, a metalreceptacle below said discharge pipe, a substantially vertical pipeleading to said metal receptacle and into Which said hopper dischargepipe leads, a valve in said vertical pipe,,an expansion chamber incommunication with and between said vertical pipe and disintegrator, anda suction device common to said vertical pipe, receptacle and(lisintegrator, su-bstanl5 tially as described.

In testimony whereof I have affixed my signature in the presence of twoWitnesses.

' MILTON F. \VILLIAMS. lVitnesses:

BESSIE RYAN, \VM. G. VEBER

